6.
REASSEMBLY
6-1
CLEANING
BEFORE
REASSEMBLY
Check all sliding and rotating parts, such as piston, cylinder,crankshaft and bearings for defect.
Wash the disassembled parts
in
kerosene to remove dust, dirt and contaminated oil thoroughly.
Wash
them twice, first time remove visible dirt roughly, and second time using fresh kerosene.
After washing, blow them thoroughly with compressed air.
Do
not wash electric parts. Wipe them with clean cloth and dry them.
Accumulated carbon on the cylinder-head, gasket, piston, cylinder and inside the muffler
to
be
carefully removed, and finish the piston with oil stone to get smooth surface.
Parts
of
carburetor to be washed carefully with gasoline and blow them thoroughly with compressed
air.
Check the cable for any damage.
Air-cleaner element shall be washed in
the
detergent and dry thoroughly. Then put it to mixture of
2
to
4
kerosene and
1
engine oil, and assemble it after squeezed well.
Take special care not to contaminate the parts with dust and apply mobile oil on the surface
in
order
to prevent rust.
\.
I'
6-2
CHECKS
AND
CORRECTIONS BEFORE REASSEMBLY
After disassembling and cleaning the engine parts, check them and, if necessary, correct them according
to the section"CLEARANCE DATA
and
LIMITS
/
TORQUE
SPECIFICATIONS."
Gaskets and rubber
pipes shall
be
replaced with new ones.
6-3
PRECAUTIONS
FOR
REASSEMBLY
0
'\
1
(1)
Clean
parts
thoroughly before reassembly. Pay most attention to cleanliness of piston, cylinder,
(2)
Take care not
to
contaminate the
parts
with dust during reassembly.
(3)
Check lip of oil seals. Replace oil seal if the lip
is
damaged.
(4)
Replace all the gaskets with new ones. Use only designated sealing agent.
Do
not apply oil to parts
(5)
Replace keys, pins, bolts, nuts, etc., if necessary.
(6)
Be sure to assemble those parts provided with alignment marks by bringing the marks in alignment.
(7)
Tighten
bolts,
nuts and screws to the correct torque specified. When there is no torque specification,
crankshaft, connecting rod and bearings.
Apply
oil
to
the
lip before reassembly.
where packings or sealing agents are used.
tighten them to torque readings appropriate to'the size.
Standard Tightening Torque for screws are as
follows:
6mm
.............................
90
kgf-cm
(6.5
ft. Ib)
250
kgf-cm
(18
ft. Ib)
IOmm
.............................
370
kgf-cm
(26.7
ft. lb)
gmrn
.............................
If small screws are over torqued, they may get broken. When tightening several screws fastening
a
single part, tighten them all evenly, by alternately tightening diagonally located parts.
(8)
Apply oil to rotating and sliding parts.
(9)
Check and adjust clearances and end plays where specified in this manual.
(10)
During the assembly,
turn
the moving part
by
hand to check for friction and noise.
(11)
After the completion of reassembly, turn the engine by hand and check if there is any disorder or
n
loose members.
'.
,)
-22-
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